WO2013053173A1

WO2013053173A1 - Telescopic crawler chassis and engineering machinery therewith

Info

Publication number: WO2013053173A1
Application number: PCT/CN2011/083264
Authority: WO
Inventors: 钱奂云; 何清华; 朱建新
Original assignee: 山河智能装备股份有限公司
Priority date: 2011-10-11
Filing date: 2011-11-30
Publication date: 2013-04-18
Also published as: CN102390446A; JP2014534106A; KR101618696B1; US20140224555A1; KR20140093231A; JP5903493B2

Abstract

Disclosed are a telescopic crawler chassis and engineering machinery therewith. The telescopic crawler chassis comprises a left crawler frame (2), a right crawler frame (3), a base seat (1), a left telescopic oil cylinder (18), a right telescopic oil cylinder (19), left sliding cross-members (5, 21) and right sliding cross-members (7, 22), wherein the telescopic oil cylinders (18, 19) are mounted between the base seat and the left crawler frame; the base seat is provided with a hollow sliding seat (4); and one end of the sliding cross-members (5, 21, 7, 22) is fixedly coupled to the crawler frame, the other end thereof being movably inserted into the hollow sliding seat, and the right sliding cross-member also being inserted into the hollow portion of the left sliding cross-member. Changing or converting the state of the engineering machinery is more convenient, and the moving and operating stability of the whole machinery are higher, safer and more reliable.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention This application claims priority to a patent application filed on Jan. 11, 2011, to the Chinese National Intellectual Property Office, Application No. 201110305831.6. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to crawler chassis technology for construction machinery, and more particularly to a retractable crawler chassis, and to a crawler type construction machine having the same. BACKGROUND OF THE INVENTION In a construction machinery chassis, since the crawler type of walking has both adaptability and flexibility, the crawler chassis has a wide range of applications in construction machinery, such as pile drivers, drills, cranes, and the like. With the development of engineering technology, engineering operations have put forward higher requirements for crawler-type construction machinery. For example, in recent years, pile foundation engineering in construction engineering has developed rapidly, super-high buildings have been increasing, and the diameter and depth of pile foundations have also increased. Increasing. The increase in the diameter and depth of the pile foundation places higher demands on the stability of the pile machinery. It is required that the width of the crawler chassis can be increased during the construction work. Similarly, other engineering operations also put forward the same requirements for the corresponding crawler construction machinery. During the construction work, the crawler chassis is required to have a large width to ensure the stability of the construction machinery. Increasing the width of the crawler chassis can solve the stability problem during construction work, but simply increasing the width of the crawler chassis means increasing the size and weight of the chassis, resulting in increased manufacturing costs, increased energy consumption during use, and inconvenient transportation. And other issues. In order to coordinate the stability of construction operations and the flexibility of transfer transportation, the current crawler construction machinery has a retractable structure, that is, a retractable crawler chassis has emerged. The crawler chassis has two states: operation status and transition In the state, during the construction work, the crawler chassis is in operation, and the crawler frames on both sides extend to both sides, so that the width of the crawler chassis is increased to improve the stability of the construction machinery; when the transport is transferred, the chassis is in transition. In the state, the crawler frames on both sides are retracted, which reduces the width of the crawler chassis and makes the transfer transportation more convenient. It is well known (for example, "Pile Machinery" published by Machinery Industry Press, Chapter 5, page 79~page 92) Crawler Chassis: Generally, the crawler chassis of a crawler crane is borrowed. The disadvantages are: In order to achieve the contraction and widening of the tracks on both sides, there is a large gap between the track bracket and the overhanging beam of the chassis; After widening to the maximum size, the amount of overlap between the overhanging beam and the crawler bracket is small, and there are unstable factors in the structure, which may cause the column in the operation to shake and the like; and the track width is also limited: generally ≤ 4300mm. In order to further widen and increase the amount of overlap, a hinge plate structure is adopted. When the transportation shrinks, the two hinge plates are opened, and when the width is widened, the two hinge plates are combined to realize the purpose of extending the beam and increasing the amount of overlap, although this The structure can make the track width of the track reach about 4600mm, but still has the following disadvantages: The hinge plate structure itself has the problem of instability, and there is still a problem that there is a large gap between the track bracket and the outrigger beam, and the pile frame walking and operation are still not Smooth; therefore, the important performance parameters of the height of the pile post, the weight of the work carried, and the maximum working torque can be compromised. Further, as disclosed in the patent CN101806063A, a crawler type pile frame and a mounting method thereof, the chassis is provided with a base, a hollow outwardly extending beam, a hollow sliding beam, a sliding beam, and one end of the hollow sliding beam and the sliding beam are respectively fixed with the crawler walking device, The other end is movably inserted into the hollow outrigger. The crawler can be moved by the hollow sliding beam and the sliding beam with respect to the outrigger of the chassis. When the crawler moves on both sides, the front end of the sliding beam can be inserted. The hollow portion of the hollow sliding beam forms an overlapping state. Although the sliding beam and the hollow sliding beam can be overlapped when the crawler traveling device is inwardly contracted, the size of the track is widened when the two crawler belts are extended, which increases the overall stability of the pile frame, but still has the following disadvantages: The width of the track on both sides should be ≤ 3300mm. Therefore, when the track on both sides is widened to the maximum size (≤6000mm), the sliding beam and the hollow sliding beam are completely disengaged, and the sliding beam and the extension are extended. There is a limit to the actual amount of overlap between the beams, and there are still unstable factors in the structure. Another example is the patent CN1587543A electro-hydraulic crawler pile frame disclosed: the chassis is further provided with a sliding beam and a fixing device, and the outrigger is hollow structure, one end of the sliding beam is fixed with the crawler walking device, and the other end is movably Inserted into the hollow outrigger beam, the crawler walking device can be moved relative to the outrigger beam by means of the sliding beam, and can be rigidly fixedly coupled with the outrigger beam of the chassis by means of the fixing device. Since the crawler walking device overlaps and moves relative to the hollow sliding seat of the chassis by the sliding beam, the width of the crawler walking device on both sides is wider than that of the prior art (4300 mm) while ensuring sufficient overlapping length between each other. (It can reach 5000~6000mm); At the same time, when the crawler walking devices on both sides are widened to the maximum size, the sliding beams can also overlap each other, which further ensures and improves the walking and operation of the pile frame. Overall stability. The size of the crawler tracker remains ≤3300mm when it is retracted, and it can be transported as a whole without disassembling the track. However, there are still the following deficiencies: If the large track pile frame requires that the crawler belts on both sides be widened (>6000mm), the sliding beam and the hollow sliding beam will be disengaged due to the structural size constraints, and the sliding beam and the outrigger beam The actual amount of overlap between the two is limited, and there are still unstable factors in the structure. Patent CN101402377A discloses a retractable crawler chassis comprising left and right crawler frames, left and right telescopic cylinders and a center frame, and a left telescopic cylinder mounted between the center frame and the left track frame, right telescopic oil The cylinder is installed between the center frame and the right crawler frame, the left crawler frame includes a left telescopic beam, the right crawler frame includes a right telescopic beam, the left telescopic beam cooperates with a left telescopic hole of the center frame, and the right telescopic beam and the right frame of the right telescopic The hole is matched; the telescopic direction of the left telescopic cylinder is parallel to the center line of the left telescopic hole, and the telescopic direction of the right telescopic cylinder is parallel to the center line of the right telescopic hole. Although the retractable crawler chassis is easy to achieve a wider widened size, if it is widened to the widest size, there is still a structural instability. SUMMARY OF THE INVENTION In one aspect, the technical problem to be solved by the present invention is to provide a retractable crawler chassis based on the above-mentioned retractable crawler chassis, and the crawler chassis structure is more reasonable, so that the state change or conversion is more convenient. The machine is more stable and safer to walk and work. In order to solve the above technical problem, the present invention provides a retractable crawler chassis comprising: at least one fixed hollow slide, further comprising at least one hollow left sliding beam, at least one right sliding beam, one end of the hollow left sliding beam The left crawler frame is fixedly coupled, and the other end is movably inserted into the inner cavity of the hollow sliding seat from a left end of the hollow sliding seat; one end of the right sliding beam is fixedly coupled with the right crawler frame, and One end is movably inserted into the inner cavity of the left sliding beam from the right end of the hollow slide. Further, the present invention provides a retractable crawler chassis comprising: a left crawler frame, a right crawler frame, a base, at least one left telescopic cylinder and at least one right telescopic cylinder, the left telescopic cylinder being mounted between the base and the left crawler frame, The right telescopic cylinder is mounted between the base and the right crawler frame, the base is provided with at least one fixed hollow sliding seat, and further comprises at least one hollow left sliding beam, at least one right sliding beam, the hollow left One end of the sliding beam is fixedly coupled with the left crawler frame, and the other end is movably inserted into the inner cavity of the hollow sliding seat from the left end of the hollow sliding seat; one end of the right sliding beam is fixedly coupled with the right crawler frame, and the other end is hollow The right end of the carriage is movably inserted into the inner cavity of the hollow slide and the inner cavity of the left slide beam. Further, when the left left sliding beam and the right sliding beam are inwardly contracted or outwardly widened to a maximum width, the front end of the right sliding beam is inserted into the inner cavity of the hollow left sliding beam. in. The left sliding beam and the right sliding beam are overlapped and overlapped, which further ensures and improves the overall stability of the equipment supported by the retractable track chassis. Further, the retractable crawler chassis further includes a stepped intermediate transition beam, the right sliding beam is a hollow structure having an inner cavity, one end of the intermediate transition beam is large, the other end is small, and the small end of the intermediate transition beam is movably Inserted into the inner cavity of the right sliding beam, the big end of the intermediate transition beam is located outside the inner cavity of the right sliding beam, and the big end of the intermediate transition beam and the right sliding beam can be inserted into the cavity of the hollow left sliding beam together , an intermediate transition beam slip limit mechanism is arranged on the hollow left sliding beam, the right sliding beam and/or the intermediate transition beam, The small end of the intermediate transition beam cannot be separated from the inner cavity of the right sliding beam when sliding, and the large end cannot be separated from the inner cavity of the hollow left sliding beam when sliding. Further, the slip limiting mechanism includes: an axially extending long groove is disposed on the right sliding beam, and the first convex embedded in the long groove is disposed at the front end of the hollow left sliding beam. Block, the sliding beam can move in the groove during sliding, and the maximum stroke is blocked by the big end of the intermediate transition beam; the intermediate transition beam is provided with an axially extending long waist groove, sliding on the right The front end of the inner cavity of the beam is provided with a second protrusion embedded in the long waist groove, and the second beam can move in the long waist groove during the sliding process. During the outward widening of the crawler belts on both sides, the bumps are in contact with the large end of the intermediate transition beam and the right end of the long waist groove, and the intermediate transition beam protrudes from the sliding beam to make the crawler belts on both sides The outer width is widened to the maximum design width, and the intermediate transition beams can be used to maintain more overlapping of the sliding beams on both sides, thereby further ensuring and improving the overall stability of the pile frame during walking and operation. Further, the hollow sliding seat, the hollow left sliding beam and the right sliding beam are provided with positioning pin holes, and the hollow left sliding beam and the right sliding beam are fixed to each other by the positioning pin passing through the positioning pin hole and the hollow sliding seat. Further, the hollow sliding seat comprises a front hollow sliding seat and a rear hollow sliding seat, the left sliding beam comprises a front left sliding beam and a rear left sliding beam; the right sliding beam comprises a front right sliding beam and a rear right sliding beam The front hollow sliding seat cooperates with the front left sliding beam and the front right sliding beam, and the rear hollow sliding seat cooperates with the rear left sliding beam and the rear right sliding beam. Further, the front hollow sliding seat is located at a front portion of the base; the rear hollow sliding seat is located at a rear portion of the base, and the front hollow sliding seat and the rear hollow sliding seat are parallel to each other. Further, the left telescopic cylinder is between the front left sliding beam and the rear left sliding beam, and the right telescopic cylinder is between the front right sliding beam and the rear right sliding beam. Further, the hollow sliding seat penetrates the left end and the right end of the base. The above improvements or preferred technical solutions may be implemented separately or in combination without conflict. The hollow left sliding beam, the right sliding beam and other left and right members can be interchanged with the left and right positions. On the other hand, the technical problem to be solved by the present invention is to provide a crawler type construction machine whose crawler chassis structure is more reasonable, the working state is changed or converted more conveniently, and the whole machine is more stable and safer to walk and work. . In order to solve the above technical problem, the crawler type construction machine provided by the present invention comprises a crawler chassis, and the crawler chassis is a retractable crawler chassis according to any one of the foregoing aspects. The crawler type construction machine provided by the present invention includes crawler pile driving machinery, crawler drilling machine, crawler pile driver, crawler type rake machine, crawler type excavator, crawler type milling machine, crawler type mixer, crawler type excavator, crawler belt Transporters, crawler trucks, crawler cranes, crawler mining machinery, etc. The retractable crawler chassis of the present invention has the following positive effects and advantages: Since the left and right crawler frames overlap and move relative to each other by the sliding cross beam and the hollow slide of the chassis, a sufficient amount of overlap between the sliding beam and the hollow slide is ensured. At the same time, the expansion of the crawler belts on both sides is wider than the prior art (5000~6000mm) (up to 6000~7000mm), and the stability of the construction machinery during walking and operation is improved; in the preferred scheme, on both sides When the crawler walking device is widened to the maximum size, the intermediate transition beams prevent more overlap between the sliding beams, which further ensures and improves the stability of the construction machinery during walking and operation. Since the left and right crawler frames can be moved and contracted relative to the base, and can be rigidly coupled with the sliding beam, the stability of the construction machinery and the operation can be ensured from the structural form. The beneficial effects of improved stability are:

1 Improve the safety and reliability of construction machinery construction, and prevent accidents such as tipping of construction machinery;

2 When the height of the construction machinery column or cantilever is constant, a larger type of piling, drilling or lifting equipment can be installed on the construction machinery to expand the scope of use and utilization of the construction machinery; When the type of the working device is constant, the length of the column or cantilever can be increased, the working range can be increased, and the construction efficiency can be improved;

4 Under the premise of meeting the safety and stability of construction machinery, it is easy to make the size of the crawler running device of construction machinery shrinkage ≤ 3300mm, which can be transported as a whole without disassembling the crawler, which is convenient for transition and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing the structure of a retractable crawler chassis construction machine; FIG. 2 is a schematic view showing the structure of a retractable crawler chassis; FIG. 3 is a cross-sectional structural view of FIG. 2A-A; FIG. 5 is a cross-sectional view taken along line CC of FIG. 4; FIG. The present invention will be described in detail below with reference to the accompanying drawings, and the description of the present invention is merely exemplary and explanatory, and should not be construed as limiting the scope of the invention. Embodiment 1 provides a retractable crawler chassis of a pile driver. As shown in FIG. 2, the retractable crawler chassis includes a base 1, a left crawler frame 2, a right crawler frame 3, a left telescopic cylinder 18, and a right telescopic cylinder. 19. The base 1 is provided with a rear hollow sliding seat 4 and a front hollow sliding seat 20 which are fixed to the left and right of the base 1 and fixed to the base 1. The rear hollow sliding seat 4 is located at the rear of the base 1, and the front hollow sliding seat 20 is located at the base. a front portion; a rear hollow slide 4 and a front hollow slide 20 are parallel to each other; the retractable crawler chassis further includes a hollow rear left slide beam 5 and a rear right slide beam 7, a hollow front left slide beam 21 and front Right sliding beam 22, one end of the hollow rear left sliding beam 5 is fixedly coupled with the left crawler frame 2, and the other end is movably inserted into the inner cavity of the rear hollow sliding seat 4 from the left end of the rear hollow sliding seat 4, One end of the rear right sliding beam 7 is fixedly coupled with the right crawler frame 3, and the other end is movably inserted into the inner cavity of the rear hollow sliding seat 4 and the first inner cavity 6 of the rear left sliding beam 5 from the right end of the rear hollow sliding seat 4. One end of the hollow front left sliding beam 21 is fixedly coupled with the left crawler frame 2, and the other end is movably inserted into the inner cavity of the front hollow sliding seat 20 from the left end of the front hollow sliding seat 20, the front right One end of the sliding beam 22 is fixedly coupled with the right crawler frame 3, and the other end is from the front. 20 is a right end empty carriage is movably inserted into the hollow lumen of the front carriage and the lumen 20 of the left sliding beam 21. The rear hollow sliding seat 4, the hollow rear left sliding beam 5 and the rear right sliding beam 7 are provided with a plurality of positioning pin holes, and the hollow rear left sliding beam 5 and the rear right sliding beam are respectively respectively passed through the positioning pin shafts 16, 17. 7 and the rear hollow sliding seat 4 are fixed to each other; the front hollow sliding seat 20, the hollow front left sliding beam 21 and the front right sliding beam 22 are also provided with a plurality of positioning pin holes, which are respectively hollow through the positioning pins 23 and 24 The front left sliding beam 21 and the front right sliding beam 22 and the front hollow sliding seat 20 are fixed to each other, and the expanded width of the left crawler frame 2 and the right crawler frame 3 can be conveniently adjusted by using a plurality of positioning pin holes provided. The left telescopic cylinder 18 is installed between the base 1 and the left crawler frame 2, and the right telescopic cylinder 19 is installed between the base 1 and the right crawler frame 3, and the left telescopic cylinder 18 slides the beam 5 and the front left rear Between the left sliding beams 21, the right telescopic cylinder 19 is between the rear right sliding beam 7 and the front right sliding beam 22. As shown in FIG. 3, the rear right sliding beam 7 of the retractable crawler chassis of the first embodiment is a hollow structure having a second inner cavity 8. In the second inner cavity 8 of the rear left sliding beam 5 and the rear right sliding beam 7, a stepped rear intermediate transition beam 11 is further provided, and the small end 9 of the rear intermediate transition beam 11 is movably inserted into the rear right sliding beam 7 Among the second inner cavities 8, the large end 10 of the intermediate transition beam 11 is located outside the second inner cavity 8 of the rear right sliding beam, and the large end 10 of the rear intermediate transition beam 11 and the rear right sliding beam 7 are insertably movable together. In the first inner cavity 6 of the hollow rear left sliding beam 5, an axially long groove 13 is provided in the rear right sliding beam 7, and is disposed at the front end of the first inner cavity 6 of the hollow rear left sliding beam 5 a projection 12 embedded in the axially long groove 13, the projection 12 being movable within the groove 13 during sliding, and being received by the large end 10 of the rear intermediate transition beam 11 Blocking; the rear intermediate transition beam 11 is provided with an axial long waist groove 14 , which is disposed in the front end of the second inner cavity 8 of the rear right sliding beam 7 and embedded in the axial long waist groove 14 The bump 15 , the sliding beam 15 can move in the axial long waist groove 14 during the sliding process, so that the small end 9 of the rear intermediate transition beam 11 can not be separated from the rear right sliding beam 7 when sliding Among the second inner chambers 8, the large end 10 of the intermediate transition beam 11 cannot be detached from the first inner chamber 6 of the hollow rear left sliding beam 5 when sliding. The front intermediate sliding beam 21 and the front right sliding beam 22 of the retractable crawler chassis are also provided with the same front intermediate transition beam and the sliding limit mechanism in the inner cavity of the front right sliding beam 22, which will not be described in detail herein. The rear intermediate transition beam 11 and the front intermediate transition beam are provided with positioning pin holes for fixing the pin shaft. The working process of the retractable crawler chassis provided in the first embodiment is as follows: when the pistons of the left telescopic cylinder 18 and the right telescopic cylinder 19 are in a contracted state (see FIG. 2), as shown in FIGS. 4 and 5, the rear left sliding beam is shown in FIG. 4 and FIG. 5 and the front left sliding beam 21 are respectively in the cavity of the rear hollow sliding seat 4 and the front hollow sliding seat 20, and the hollow rear right sliding beam 7 and the front right sliding beam 22 respectively pass through the rear hollow sliding seat 4 and the front hollow sliding seat The right side of the 20 extends into the cavity of the rear left sliding beam 5 and the front left sliding beam 21, and the telescopic crawler chassis is contracted to the narrowest for transport and transition. When the construction work needs to increase the width of the crawler chassis, the pistons of the left telescopic cylinder 18 and the right telescopic cylinder 19 are extended out of the cylinder, and the left crawler frame 2 and the right crawler frame 3 are respectively moved to the sides, see FIG. 2 And FIG. 3, the rear left sliding beam 5 and the front left sliding beam 21 are respectively moved to the left with respect to the rear hollow sliding seat 4 and the front hollow sliding seat 20, respectively, and the rear right sliding beam 7 and the front right sliding beam 22 are respectively sliding relative to the rear. The seat 4 and the front hollow slide 20 are moved to the right. When the left crawler frame 2 and the right crawler frame 3 are respectively widened outward, when the sliding beam moves to a certain position, the rear left cross beam 5 and the front left sliding beam 21 have a front end and a middle transition beam respectively The large end contact and the two intermediate transition beams respectively protrude from the cavity of the rear right sliding beam 7 and the front right sliding beam 22; the rear right sliding beam 7 and the front right sliding beam 22 have the convex portions at the front end of the inner cavity respectively The right end of the axial long waist groove on the rear intermediate transition beam 11 and the front intermediate transition beam (the latter intermediate transition beam 11 is described as an example, the front intermediate transition beam is not shown in the figure), and The rear intermediate transition beam 11 and the front intermediate transition beam are respectively protruded from the inner cavity of the rear left sliding beam 5 and the front left sliding beam 21, so that the left crawler frame 2 and the right crawler frame 3 are outwardly widened to the maximum design width. By means of the rear intermediate transition beam 11 and the front intermediate transition beam, the mutual overlapping of the sliding beams on both sides can be maintained, and the stability of the engineering machine operation is further ensured and improved. Generally, when the track is widened within a certain width, for example, less than 6000 mm, the right sliding beam 7 is straight in the cavity of the left sliding beam 5. When the track is wider than 6000 mm, the right sliding beam 7 needs to extend through the intermediate transition beam. Slide the beam into the cavity of the beam 5 to the left. During the movement of the sliding beam, after the left track frame 2 and the right track frame 3 reach the predetermined position, the corresponding sliding beam, the hollow sliding seat and the intermediate transition beam are locked by the positioning pins 16, 17, 23, 24 to make the track chassis In the job state or transition state. According to the above description, the retractable crawler chassis provided in the first embodiment can control the left telescopic cylinder 18 and the right telescopic cylinder 19 through the hydraulic system during the state transition, thereby pushing the left crawler frame 2 and the right crawler frame 3 to move to the left. The change in width between the track frame 2 and the right track frame 3 makes the operation very simple and improves the operational performance of the retractable track chassis state transition. At the same time, since the crawler chassis is in operation, the sliding cross beam and the hollow sliding seat have a large mutual overlap, in particular, the intermediate cross beam can be used to keep the sliding beams on both sides more overlapping, thereby ensuring the operation. In this state, the rigidity and strength of the crawler chassis can meet the rigidity and strength requirements of the construction work, and the telescopic crawler chassis can be applied in construction machinery such as large pile drivers. In this embodiment, in order to provide a larger expansion span for the retractable crawler chassis in the working state, the front and rear two hollow slides penetrate the left and right ends of the base 1 to match the width of the transition state. In contrast, the retractable crawler chassis provided by the present invention can have a larger width than the width of the base 1 in the working state. In this embodiment, the left telescopic cylinder 18 and the right telescopic cylinder 19 are bilaterally symmetrical, and the extension lines of the telescopic directions of the two are slewingly supported by the base 1 and the center of the crawler frame, and the left and right crawler frames 2, 3 are moved to both sides. When the left and right crawler frames 2, 3 are balanced, the left and right crawler frames 2, 3 are prevented from being deflected during the movement, thereby causing damage to the cooperation relationship between the sliding beam and the hollow sliding seat. Those skilled in the art can understand that in order to avoid skewing of the left and right crawler frames 2, 3, a corresponding telescopic cylinder can be disposed between the corresponding sliding beam and the hollow sliding seat. Synchronous operation of multiple telescopic cylinders can push the left and right crawler frames 2, 3 to move synchronously. In another aspect of the invention, a construction machine having the above-described retractable crawler chassis is also provided. In this embodiment, the front and rear two hollow sliding seats are included, the front hollow sliding seat 4 is located at the front of the base 1, and the rear hollow sliding seat 20 is located at the rear of the base 1, the front hollow sliding seat 20 and the rear hollow sliding seat 4 Parallel to each other. The four sliding beams are symmetrical back and forth, which can ensure the stability of the engineering machinery such as the pile driver shown in Fig. 1. The retractable crawler chassis provided by the present invention will be described in detail by taking the pile driver shown in FIG. 1 as an example. Those skilled in the art can understand that in other types of crawler construction machines, the same type of retractable crawler chassis is used. It can achieve the above object and have the corresponding technical effects. Since the retractable crawler chassis has the above technical features and technical effects, the crawler type construction machine with the above retractable crawler chassis also has the above technical features and technical effects. The above is only the preferred embodiment of the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Claim

A retractable crawler chassis comprising a base, a left crawler frame and a right crawler frame, wherein: the base is provided with at least one fixed hollow slide, and at least one hollow left sliding beam, at least a right sliding beam, one end of the hollow left sliding beam is fixedly coupled to the left crawler frame, and the other end is movably inserted into the inner cavity of the hollow sliding seat from a left end of the hollow sliding seat; One end of the right sliding beam is fixedly coupled to the right crawler frame, and the other end is movably inserted into the inner cavity of the left sliding beam from the right end of the hollow sliding seat.

2. A retractable crawler chassis, comprising a base, a left crawler frame, a right crawler frame, at least one left telescopic cylinder and a right telescopic cylinder, the left telescopic cylinder being mounted between the base and the left crawler frame, The right telescopic cylinder is installed between the base and the right crawler frame, and is characterized in that: the base is provided with at least one fixed hollow sliding seat, and further comprises at least one hollow left sliding beam, at least one right a sliding beam, one end of the hollow left sliding beam is fixedly coupled to the left crawler frame, and the other end is movably inserted into the inner cavity of the hollow sliding seat from a left end of the hollow sliding seat; One end of the beam is fixedly coupled to the right crawler frame, and the other end is movably inserted into the inner cavity of the left sliding beam from the right end of the hollow slide.

The retractable crawler chassis according to claim 1 or 2, wherein: the hollow left sliding beam and the right sliding beam are inwardly contracted or outwardly widened in the left crawler frame and the right crawler frame. When the width is wide, the front end of the right sliding beam is inserted into the inner cavity of the hollow left sliding beam.

The retractable crawler chassis according to claim 1 or 2, further comprising a stepped intermediate transition beam, the right sliding beam being a hollow structure having an inner cavity, one end of the intermediate transition beam Large, the other end is small, the small end of the intermediate transition beam is movably inserted into the inner cavity of the right sliding beam, and the large end of the intermediate transition beam is located outside the inner cavity of the right sliding beam, the middle a large end of the transition beam and the right sliding beam are movably inserted into the inner cavity of the hollow left sliding beam, and the hollow left sliding beam, the right sliding beam and/or the intermediate transition The sliding member is provided with a sliding limit mechanism of the intermediate transition beam, so that the small end of the intermediate transition beam cannot be separated from the inner cavity of the right sliding beam when sliding, and the large end cannot be separated from the hollow left when sliding Slide the inner cavity of the beam.

The retractable crawler chassis according to claim 4, wherein: the sliding limit mechanism comprises: a long groove extending in the axial direction on the right sliding beam, a front end of the inner cavity of the hollow left sliding beam is provided with a first protrusion embedded in the long groove, the first protrusion is in the The long groove is movable, and the maximum stroke of the first protrusion is blocked by the large end of the intermediate transition beam; the intermediate transition beam is provided with a long waist groove extending in the axial direction, A second protrusion embedded in the long waist groove is disposed at a front end of the inner cavity of the right sliding beam, and the second protrusion is movable in the long waist groove.

The retractable crawler chassis according to claim 1 or 2, wherein: the hollow sliding seat, the hollow left sliding beam and the right sliding beam are provided with positioning pin holes, which are respectively hollow through the positioning pin shafts The left sliding beam and the right sliding beam are fixed to each other by the hollow sliding seat.

7. The retractable crawler chassis according to claim 2, wherein: the hollow slide comprises a front hollow slide and a rear hollow slide, and the left slide beam comprises a front left sliding beam and a rear left sliding beam. The right sliding beam includes a front right sliding beam and a rear right sliding beam; the front hollow sliding seat cooperates with the front left sliding beam and the front right sliding beam, the rear hollow sliding seat and the rear left sliding beam and the rear right The sliding beams match.

8. The retractable crawler chassis according to claim 7, wherein: the front hollow sliding seat is located at a front portion of the base; the rear hollow sliding seat is located at a rear portion of the base, the front hollow sliding seat and the rear hollow sliding seat. Parallel to each other.

9. The retractable crawler chassis according to claim 7, wherein: the left telescopic cylinder is between a front left sliding beam and a rear left sliding beam, and the right telescopic cylinder is in front right sliding beam and rear right Between the sliding beams.

The retractable crawler chassis according to claim 1 or 2, wherein the hollow slide passes through the left and right sides of the base.

A crawler type construction machine comprising a crawler chassis, wherein: the crawler chassis is the retractable crawler chassis according to any one of claims 1-10.

12. The crawler-type construction machine according to claim 11, wherein the construction machine comprises a crawler pile-type pile machine, a crawler type drill, a crawler pile driver, a crawler type rake machine, a crawler type excavator, and a crawler belt. Milling machines, crawler mixers, crawler excavators, crawler conveyors, crawler trucks, crawler cranes, tracked mining machinery.